PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE
 | PIRSA:11030110
( Flash Presentation , Windows Presentation , Windows Video File , MP3 , PDF) Which Format?
Imperfect Dark Energy of Kinetic Gravity Braiding Speaker(s): Alex Vikman
Abstract: In this talk I will discuss a new class of cosmological scalar fields. Similarly to gravity, these theories are described by actions linearly depending on second derivatives. The latter can not be excluded without breaking the generally covariant formulation of the action principle. Despite the pres... read more
Date: 03/03/2011 - 11:00 am
Series: Cosmology & Gravitation
|
 | PIRSA:07090029
( Flash Presentation , Windows Presentation , Windows Video File , MP3 , PDF) Which Format?
K-Essence, superluminal propagation, causality and emergent geometry Speaker(s): Alex Vikman
Abstract: The k-essence theories admit the superluminal propagation of the perturbations on classical nontrivial backgrounds. In this talk I will review our arguments from arXiv:0708.0561v1 and show that in spite of the superluminal propagation the causal paradoxes do not arise in these theories and in this r... read more
Date: 14/09/2007 - 10:00 am
Collection: Frontiers of Modern Cosmology
|
 | PIRSA:06120022
( Flash Presentation , Windows Presentation , Windows Video File , MP3 , PDF) Which Format?
Superluminal - scalar fields and cosmology Speaker(s): Alex Vikman
Abstract:
Date: 05/12/2006 - 11:30 am
Collection: Young Researchers Conference - 2006
|
